Seropositivity and Associated Risk Factors in Cats () in Three Provinces in Northeastern China from 2013 to 2019.

is an important protozoan parasite that can infect a range of animals. Cats are the most important definitive hosts for . Therefore, an assessment of the level of infection in cats is of public health importance. As limited information about seroprevalence of infection in cats in northeastern China was available, 854 serum samples, including 235 cats in Jilin province, 267 cats in Liaoning province, and 352 cats in Heilongjiang province, were examined by an indirect hemagglutination assay (IHA) test, between September 2013 and July 2019. The overall seroprevalence of was 19.09% (163/854) at the cutoff 1:64, with 19.60% (69/352), 18.29% (43/235), and 19.10% (51/267) in Heilongjiang, Jilin and Liaoning, respectively. Logistic regression analysis showed that mode of life was highly related to infection in cats at the investigation areas. These results could provide foundation data for prevention and control of prevalence in these regions. Moreover, the results also suggested that the effective control strategies should continue to be performed.